Limit Anti-pull-off Pressure Disc Expansion Joint

Limit anti-pull-off pressure plate expansion joint is a kind of common pipeline fittings for compensating axial displacement, preventing dragging and ensuring the stable operation of pipeline system.

Overview

Limit anti-pull-off pressure expansion joint is a commonly used pipe fittings, through its own expansion and damping effect, to absorb vibration and displacement in the pipeline system, mainly used to compensate for the axial displacement of the pipeline due to thermal expansion and contraction, to prevent the pipeline from being disengaged due to external tension, and to protect the pipeline and equipment from damage.

Structural components

Expansion pipe: Expansion pipe is the core component of the expansion device, responsible for absorbing the axial displacement of the pipeline to compensate for the expansion and contraction of the pipeline caused by temperature change, mechanical vibration and other factors.

Flange: The flange is used to connect the expander and the pipeline, which is connected by bolts to form a complete expansion structure. The design of flange makes installation and maintenance more convenient.

Pressure plate: The pressure plate is used in conjunction with the flange plate and is connected by bolts, playing the role of limiting and preventing pull-off. When the pipe is subjected to external tension, the pressure plate and the flange will squeeze each other, generating friction, limiting the displacement and force of the pipe, and protecting the safety of the piping system.

Sealing ring: The sealing ring is located between the expansion pipe and the flange to ensure the sealing performance of the expander and prevent leakage.

Bolts and Nuts: Bolts and nuts are used to fasten the various parts of the telescope together to ensure the stability and safety of the telescope.

characteristics:

Sufficient fit clearance: designed with sufficient fit clearance, it makes installation and disassembly more convenient, saving time and labor.

Anti-pull-off limit device: by adjusting the expansion nut, the expansion amount of the telescope can be freely adjusted and controlled to prevent pull-off accidents caused by excessive axial displacement.

Deflection displacement angle: the product has a unique internal design with a 5℃-15℃ deflection displacement angle to adapt to different installation needs.

Installing the date sheet
DN		Standard type			Flange Size			Limit spiral
mm	Inch	Maximum length mm	Minimum length mm	Installation length L mm	D₁	n-d	n=M	Z-M
32	1.25	130	100	115	100	4-18	4-16	2-16
40	1.5	165	130	145	115	4-18	4-16	2-16
50	2	170	139	155	125	4-18	4-16	2-16
65	2.5	187	153	170	145	4-18	4-16	2-16
80	3	208	164	180	160	4-18	4-16	2-16
100	4	221	179	200	180	8-18	8-16	2-16
125	5	237	192	215	210	8-18	8-16	2-16
150	6	260	210	235	240	8-23	8-20	2-20
200	8	275	224	250	295	8-23	8-20	2-20
250	10	292	238	265	350	12-13	12-20	3-20
300	12	308	255	280	400	12-13	12-20	3-20
350	14	328	272	300	460	16-23	16-20	4-20
400	16	345	286	315	515	16-25	16-22	4-22
450	18	362	298	330	565	20-25	20-22	5-22
500	20	380	312	345	620	20-25	20-22	5-22
600	24	398	322	360	725	20-30	20-27	5-27
700	28	420	341	380	840	24-30	24-27	6-27
800	32	440	358	400	950	24-34	24-30	6-30
900	36	470	384	425	1050	28-34	28-30	7-30
1000	40	498	410	450	1160	28-34	28-30	7-30
1200	48	530	440	485	1380	32-41	32-36	8-36
1400	56	560	460	510	1590	36-48	36-42	9-42
1600	64	580	480	530	1820	40-54	40-48	10-48
1800	72	620	509	560	2020	44-54	44-48	11-48
2000	80	680	500	590	2230	46-54	46-48	12-48
2200	88	720	540	630	2390	52-48	52-42	13-42
2400	96	740	580	660	2600	56-48	56-42	14-42
2600	104	780	600	690	2810	60-54	60-48	15-48
2800	112	810	620	715	3020	64-54	64-48	16-48
3000	120	840	640	740	3220	68-54	68-48	17-48

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